OpenCode bug: deepseek-v4.1-flash image rejection permanently bricks sessions
JavaGT · ghdev · 2026-11-05
An OpenCode issue reports that after an agent read six PNG screenshots in a UI-verification loop on opencode-go/deepseek-v4.1-flash#high, every subsequent request fails with "image input is not available on this engine" and the session becomes permanently unusable. Inconsistent fresh-session reproduction (same 1×1 PNG fails once, succeeds minutes later; -f attachment works) points to per-request backend routing in the Go gateway rather than a client-side bug. A practical pitfall for long visual-verification agent sessions.
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